-6.30182e-17 is effectively zero.
Archicad has always had this error (someone else will have to explain why – floating decimals or something?).
-6.30182e-17 = -0.000000000000000630182
I will often just change it to zero in a script just to make it easier to read.
Barry.
Versions 6.5 to 22
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Dell Precision M6800 - i7 4700MQ @ 2.40GHz, 16GB RAM, AMD FirePro M6100 (2GB), Windows 7 64bit